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Better Boat

Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, Clear, 10 oz

  • Based on 735 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Aug 12
Order within 13 hours and 53 minutes
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Color: Clear


Features

  • HEAVY-DUTY ELASTOMERIC SEALANT: Waterproof long-lasting superior strength above & below waterline to repair seams and stop leaks. Seal ports, wind-shields and more. Remains Flexible and can twist, bend, expand and contract with weather conditions.
  • FLEXIBLE PERMANENT BOND UV LIGHT AND SALTWATER RESISTANT: One-part sealant that forms a tough yet flexible permanent bond resistant to sunlight, rain, fresh & salt-water. Fast cure formula cures clear then can be sanded and painted unlike silicone.
  • SEALS & ADHERES TO MULTIPLE SURFACES: Marine Adhesive works with fiberglass, glass, plastic, metal & wood. Safely and securely repairs windshields, joints, hardware, aluminum boats, pool decks, aquarium sealent , pool caulking , RV and Auto repairs.
  • MADE IN THE USA & EXCEPTIONAL QUALITY: Made by boaters for boaters, our waterproof sealant and other products are made to strict, tested, trade-secret standards and you will find this premium marine sealant is no exception.
  • WHY BETTER BOAT: An American company with a line of premium quality boat detailing supplies. We offer the tools and products needed to make caring for your boat easier so you can spend more time on the water.

Description

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Brand Name: Better Boat


Number of Items: 1


Manufacturer: Better Boat


UPC: 850033414141


Unit Count: 10 Ounce


Model: BB-MRSL-CLR


Part Number: BB-MRSL-CLR


Best Sellers Rank: #50,081 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #113 in Silicone Caulk


ASIN: B09QVXKKKF


Customer Reviews: 4.3 4.3 out of 5 stars (735) 4.3 out of 5 stars


Full Cure Time: 3E+1 Days


Surface Recommendation: Window, Door, Sink, Tub, Walls


Water Resistance Level: Waterproof


Color: Clear


Item Form: Paste


Item Weight: 10 Ounces


Liquid Volume: 10 Fluid Ounces


Material Type: Elastomeric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works! Works!
Color: Gray Size: 10 oz
Review Image by Blaze Gomez
Works as advertised. I used it to reinforce boat flooring that I repurposed as cover for the benches on a small vintage fishing boat. After a few months out on the water, this produce still sticks like the day I installed the flooring. Good produce for marine use.
Reviewed in the United States on November 29, 2025 Reviewed in the United States on November 29, 2025 by Blaze Gomez
    • Waterproof
Color: Brown Size: 10 oz
Excellent product
Reviewed in the United States on April 25, 2026 by Pauline P.
    • Easy to use
Worked great. Stopped a small leak around a screw in my kayak. Very sticky and messy to apply. A tapered tip would make it easier and less messy to apply to small areas. Probably should have worn gloves when using. As it sticks to everything it touches. I only needed a small amount, and I have plenty left over. ... show more
Reviewed in the United States on July 16, 2025 by Tracy B
    • Very satisfied with waterproofing
Color: Clear Size: 10 oz
Very nice and so far working great Only negative is the applying tube was bent about 45 degrees. Package was not damaged at all. I bent it back straight and was able to use
Reviewed in the United States on September 14, 2025 by Larry W Summitt
    • Great product, Great customer service.
Color: Gray Size: 3 oz
Great stuff. miracle material. underwater, overwater, quick cure, etc. the first tube that I bought- stuff is thick, as I was squeezing it, it leaked at the crimp and also around the round transition on top- I may have been squeezing too hard (?) or didn't cut the nozzle as big as I needed. reached out to company- they have a satisfaction guarantee. and they painlessly sent me another tube. !!! ... show more
Reviewed in the United States on July 4, 2025 by J. Buckman
    • Seller and product both failures.
Color: White Size: 10 oz
This product was used for a small hole and failed significantly. Although the seller says he will stand behind this product he does not at all..
Reviewed in the United States on March 25, 2026 by consumer
    • Excellent Adhesive
This sets up very quickly, yet takes a long time to cure. Stays pliable weeks later. Highly recommend. Wish it came in a larger tube.
Reviewed in the United States on August 18, 2025 by Michael Hathaway
    • Worked good but has longer cure times
Color: Clear Size: 10 oz
It worked good for my application (garage siding contact with my concrete). Applied easily and good sealing. It skinned over in about 30 minutes to an hour so I had time to work with it but it takes 7 to 10 days to cure depending on temperature, humidity and quantity used and customer service said that a 100 percent cure may take up to 30 days. It did get relatively hard in 5 days and did repel rain after it skinned over. I wanted a clear caulk/sealant and I would use it again where cure times are not critical. The end cap ring on a few tubes was oversized - so it was a tight fit getting it in and out of the caulking gun and the end cap ring came off when I took the tube out of the caulking gun - I had to pry the end cap ring out of the caulking gun which wasn't too hard to do but with the end cap ring off now it would be easier to get the tube back into the caulking gun next time and it didn't affect the operation of the tube. ... show more
Reviewed in the United States on September 25, 2022 by Dan Ullberg

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